JP2000343327A - Reamer adjustable for expansion and contraction and bore finishing machine fitted with such reamer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mechanically perform diametrical expansion and contraction of a reamer having been possible only manually according to the conventional technique by converting the rotating motions transmitted to a screw shaft in the reamer body into linear motions of s slide shaft. SOLUTION: A reamer body 1 is composed of a hollow shuttle part 2 and a grinding part 3 formed cylindrically, furnished at the circumferential wall with a plurality of slits 5 in the axial direction, and with its inside surface tapered. A rotary shaft 4 consisting of a threaded cylinder is fitted in the shuttle part 2 capable of rotating externally. A slide shaft 9 whose one end is formed as a threaded shaft 7 having a guide hole 8 in the axial direction in the middle part and to whose other end a diametrically enlarging member 11 is coupled is fitted in the shuttle part 2 in screw engagement with the rotary shaft 4. Into the guide hole 8 a guide pin 10 is inserted to convert the rotating motions of the rotary shaft 4 into linear motions of the slide shaft 9. The outside diameter of the grinding part 3 is made adjustable by moving the diametrically enlarging member 11 in the axial direction together with the slide shaft 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reamer capable of adjusting the size of a grinding portion, which is used for finishing a surface such as an inner surface of a cut hole or an inner surface of a cylinder with high precision. It relates to a bore finishing machine.

A reamer capable of adjusting the scale of a grinding section is disclosed in US Pat. No. 5,482,498 and Japanese Utility Model Publication No. 3-29.
No. 065 has already been known. They form the inner peripheral surface of the grinding part into a tapered surface, insert a taper cone or ball into it, change their position up and down with a jig, and increase or decrease the outer diameter of the grinding part Was something.

[0003] The diameter adjustment with such a jig is performed manually each time, and the amount of adjustment is small. Therefore, skill is required for the adjustment, and the reamer whose diameter is adjusted is mounted on a rotating shaft of a grinding device. It was troublesome to reach the final adjustment while trying to grind it by mounting it on the surface.

The present invention has been conceived in order to solve the above-mentioned conventional problems. The object of the present invention is to use only a jig and a human hand, even if a tapered surface is employed as in the prior art. It is an object of the present invention to provide a reamer capable of mechanically expanding and reducing the diameter of the grinding portion of the reamer and capable of adjusting the expansion and contraction of the grinding portion.

Another object of the present invention is to convert the rotational movement of a main rotating shaft by a motor into a linear movement of a slide shaft built in a reamer after the reamer is mounted on a grinding and finishing device, thereby enlarging / reducing the grinding section. It is an object of the present invention to provide a reamer capable of adjusting a new configuration in which a diameter can be mechanically adjusted.

Further, the present invention can perform both the enlargement / reduction adjustment of the reamer capable of adjusting the enlargement / reduction of the grinding portion and the grinding finish processing by the reamer. To provide a bore finishing machine with a reamer capable of expansion and contraction adjustment with a new mechanism that can be performed by using an eccentric cam and an inclined disk other than a spring or a crank.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a reamer capable of adjusting expansion and contraction, comprising: a hollow shuttle portion having a rotary shaft formed by a screw cylinder which can be operated from the outside;
A cylindrical reamer body with axially long slits at multiple locations on the peripheral wall at equal intervals, an inner peripheral surface consisting of a grinding part with a tapered surface extending from the upper part of the slit to the open end, and one end part with a screw shaft at an intermediate part A guide shaft in the axial direction, and a slide shaft in the reamer main body connected to the other end of the enlarged diameter member, and the slide shaft and the rotary shaft are screwed together by the screw shaft to form the shuttle shaft. Connected
And, by the guide pin inserted from the shuttle portion side into the guide hole, the rotational motion of the rotary shaft is converted into a linear motion of the slide shaft, and the diameter increasing member that moves in the axial direction together with the slide shaft causes the grinding portion to rotate. It is said that the outer diameter is arbitrarily adjustable.

[0008] The grinding portion is made of a diamond grindstone which is set on the base material by selecting an optimal grain size and density according to the material and hardness of the workpiece.
The outer peripheral surface is formed in the same taper surface as the tapered inner peripheral surface of the grinding portion, and the outer diameter of the bottom surface is formed of a tapered cone that is substantially the same as the inner diameter of the opening end of the grinding portion, and the slide is performed by a bolt screwed to the bottom surface. It is integrally connected to the other end of the shaft, and is configured to be forcibly moved in the axial direction in the grinding section together with the slide shaft.

A bore finishing machine having a reamer capable of expansion and contraction according to the present invention is provided in a vertical direction rotatably supported by a housing held in a column so as to be vertically movable, and has a lower end provided with a mounting portion of a reamer body. A hollow main rotating shaft for grinding with a, a pinion is inserted and supported rotatably inside the main rotating shaft, and has a pinion at an upper end protruding from the main rotating shaft, and a lower end has a rotating shaft in the reamer body. A rotating shaft for reamer expansion and contraction formed on a joint connected in the main rotating shaft, an intermittent gear that temporarily meshes with the pinion and rotates the pinion together with the rotating shaft by a set rotation angle,
Detecting the tooth tip position of the intermittent gear, transmitting a signal for stopping the operation of the drive source, and a position confirmation sensor that always stops the intermittent gear outside the meshing position, and a transmission mechanism for transmitting the main rotating shaft. A main motor on the housing that is driven to rotate through the motor, and an adjusting motor that rotates the rotating shaft via the intermittent gear and the pinion, and the rotating motor rotates the lower end of the rotating shaft by the adjusting motor. It is configured to convert into linear motion of a slide shaft in a reamer body screwed to the rotating shaft, and to be able to adjust an outer diameter of a grinding portion by a diameter expanding member in a reamer body at an end of the slide shaft. It is.

The transmission mechanism includes a rotating cylinder for driving a main rotating shaft in a longitudinal direction, which is rotatably mounted on a housing, and a rotating cylinder disposed in the housing in parallel with the rotating cylinder. A drive shaft connected to the drive shaft, pulleys integrally provided around the drive shaft and the outer periphery between the bearings of the rotary cylinder, and a belt wound around the pulleys. The main rotary shaft is inserted through the key shaft, and the main rotary shaft is integrally connected to the rotary cylinder in the rotational direction so as to be freely movable in the axial direction. It is configured to be rotatable and movable up and down together with the rotating shaft.

Further, a block-shaped vibrating member for rotatably inserting and holding the upper portion of the main rotary shaft, a pair of upper and lower nipping rollers provided on the side surface of the vibrating member with a nipping interval, and the nipping roller are provided. A spinning shaft vertically provided in the housing facing in parallel with the main rotation shaft, and a slanting fitting fitted to the spinning shaft, and a peripheral edge inserted into the holding space, and a vibration member via the pair of holding rollers A vibrating disk connected to the rotating disk, a rotating disk fitted and fixed to the lower part of the spinning shaft below the vibrating disk at a required interval between the vibrating disk and the rotating disk, And a joint for connecting the vibration disk to the eccentric portion at an eccentric portion and supporting the vibration disk on the rotating disk with the connecting portion as a fulcrum.

[0012] The joint has sleeves respectively fitted in the eccentric portions of the oscillating disk and the rotating disk, spherical bearings provided in the sleeves, and oscillating through the bearings. It consists of a connecting shaft and nuts with bolts inserted over the disk and the turntable.

The joint has a circular scale plate fixed to the upper end of the sleeve on the vibrating disk side, and a pointer member protruding from a side of the connecting shaft facing the scale plate. There is also provided a means capable of setting the angle of the vibrating disk from the amount of rotation of the connecting shaft read from the pointer member.

[0014]

1 and 2 show an embodiment of a reamer according to the present invention capable of adjusting the size of a grinding portion. In the drawing, reference numeral 1 denotes a reamer main body, which comprises a hollow shuttle portion 2 and a cylindrical grinding portion 3 provided continuously at an end thereof.

The shuttle section 2 has a rotary shaft 4 formed by a screw cylinder at the end opposite to the grinding section 3 so as to be operable from the outside. The grinding unit 3 is made of a diamond grindstone electrodeposited on the base material by selecting the optimum grain size and density according to the material and hardness of the workpiece, and has axially long slits 5 and 5 at four locations on the peripheral wall at equal intervals. , Its inner peripheral surface 6 has a tapered surface (inclination 1 / 20-
1/100).

Inside the reamer body 1, a slide shaft 9 having a screw shaft 7 at one end and a guide hole 8 which is long in the axial direction at an intermediate portion is provided on the screw shaft 7 from the opening side of the grinding unit 3.
Are inserted into the rotating shaft 4 while being screwed to each other,
Thus, the rotary shaft 4 is connected to the inside of the shuttle unit 2 and is provided in the reamer main body so as to be moved only in the axial direction by the guide pin 10 inserted into the guide hole 8 from the shuttle unit side.

At the other end of the slide shaft 9, the outer peripheral surface is formed to have the same tapered surface as the tapered inner peripheral surface of the grinding portion 3, and the outer diameter of the bottom surface is substantially the same as the inner diameter of the open end of the grinding portion 3. A diameter-enlarged member 11 formed of a tapered cone housed in the open end is connected by a bolt 12 screwed to the bottom surface.

In the reamer having such a configuration, the connection terminal 4a protruding from the end face of the shuttle portion 2 is rotated from the outside, and when the rotation shaft 4 is rotated, the slide shaft screwed with the rotation shaft 4 and the screw shaft 7 is engaged. The shaft 9
Since the rotation is prevented by the guide pin 10 of the guide hole 8, the rotational motion of the rotary shaft 4 is converted into the linear motion of the slide shaft 9, and the slide shaft 9 is moved together with the diameter-enlarging member 11 of the opening. It moves inside the reamer body 1.

The moving dimension of the slide shaft 9 is proportional to the number of rotations of the rotating shaft 4, and the moving dimension becomes longer as the number of rotations increases. When the rotation of the rotating shaft 4 is rightward, the slide shaft 9 advances inward, and the enlarged diameter member 11 moves inside while pressing the peripheral wall of the grinding unit 3 outward.

Since the peripheral wall of the grinding portion 3 is divided by the slits 5 and 5, as shown in FIG. 2, the outer diameter is expanded by expanding the outer wall by the pressing force. In the figure, the enlarged diameter is exaggerated, but it is actually 0.001 mm or more.
The diameter expansion in the range of 0.2 mm is performed.

On the other hand, in the counterclockwise rotation, the slide shaft 9 retreats outward, the diameter-enlarging member 11 is returned to the opening, the pressing force against the peripheral wall is removed, and the outer diameter of the grinding portion 3 becomes the original outer diameter. It is reduced to a diameter. Accordingly, the outer diameter of the grinding unit 3 can be mechanically increased and reduced by simply rotating the rotary shaft 4 in either the left or right direction, and the outer diameter can be arbitrarily adjusted by controlling the number of rotations. Becomes

FIG. 3 shows an embodiment of a bore finishing machine having the above reamer.

In the figure, reference numeral 20 denotes a column of a bore finishing machine, and a screw shaft 21 for elevating and lowering is juxtaposed on a side portion so as to be freely rotatable. The upper end of the elevating screw shaft 21 is coupled to the drive shaft 23 of the elevating motor 22 installed on the top of the column 20 by the coupler 2.
4 is connected.

Numeral 25 denotes a drive unit housing of the bore finishing machine. A nut 27 integrally provided at the tip of an arm 26 protruding from one end face is screwed to the screw shaft 21 for raising and lowering, and is provided on the side of the column 20. The part is provided to be able to move up and down freely.

On the upper part of the housing 25, as shown in FIG. 3, a main motor 28 for rotating the reamer, a motor 29 having a speed reducer for adjusting the reamer grinding section, and a motor 30 for reamer vibration are arranged in this order. Each motor is installed in parallel with the gear transmission.

The lower housing 25 of the main motor 28
The transmission shaft 31 includes a rotary cylinder 32 for driving the main rotary shaft.
At the same time, it is mounted vertically on a housing 25 so as to be rotatable. The upper end of the transmission shaft 31 is connected to the drive shaft 3 of the electric motor 28.
3 and a toothed pulley 34 is attached to the lower end.

The rotary cylinder 32 extends vertically over the housing 25 on the lower side of the adjusting motor 29 and the bearing member 35 fixed to the lower portion of the housing, with a plurality of upper and lower portions rotatably supported. A toothed pulley 36 is fitted around the outer periphery between the bearing portions of the rotary cylinder 32, and a timing belt 37 is wound around the toothed pulley 36 and the toothed pulley 34 at the end of the transmission shaft. A transmission mechanism for rotating the rotary cylinder 32 by the main motor 28 is configured.

The rotary cylinder 32 has a hollow main rotating shaft 38 provided with a mounting portion 39 for a reamer 40 at the lower end, and a mounting portion 3 provided on the lower side of the bearing member 35 from inside the housing 25.
9 is inserted to the position where it protrudes. As shown in FIG. 4, the main rotary shaft 38 is axially movably engaged with the rotary cylinder 32 by an axial key groove 41 provided on the side and a key member 42 fitted from the rotary cylinder side. The rotary member 32 is driven to rotate with the rotary cylinder 32 via the key member 42.

A reamer 40 is provided inside the main rotating shaft 38.
A rotating shaft 43 for expanding and contracting the outer diameter of the grinding portion 3 is rotatably inserted. The rotating shaft 43 has a pinion 44 at the upper end protruding from the main rotating shaft 38, and the lower end connects the rotating shaft 4 in the main body of the reamer 40 to the main rotating shaft 38.
Are formed in a joint 45 connected inside.

An intermittent gear 45 partially meshing with the pinion 44 is formed with a required number of tooth shapes 45a which mesh with the pinion tooth shape at every rotation and rotate the pinion 44 by the set rotation angle together with the rotation shaft 43. Is attached to and adjacent to the drive shaft 47 of the adjusting motor 29 installed on the pedestal 46 on the housing.

The intermittent gear 45 detects the position of the tooth tip and sends a signal to stop the operation of the adjusting motor 29. The intermittent gear 45 is always stopped at a position outside the meshing position, and the pinion 44 is in a free state. And a proximity switch 48 is provided as a position confirmation sensor.

In the illustrated example, the tooth profile 45a is formed only at one position on the peripheral edge. However, it may be formed at two positions facing each other. In this case, the tooth profile 45a meshes with the pinion 44 every half rotation. Therefore, one rotation of the intermittent gear 45 causes the rotation shaft 4
The rotation angle of the reamer 40 is twice as large as that of the reamer 3, so that the operation of expanding and reducing the outer diameter of the reamer 40 can be performed quickly.

As shown in FIG. 6, the upper end of the lower rotating shaft 43 of the pinion 44 and the upper end of the main rotating shaft 38 are
A member 49, a pin 49b screwed into an annular groove 49a formed in the rotating shaft 43 from the member 49, and a flange 38a formed at the shaft end of the main rotating shaft 38 are connected so as to move together in the axial direction. is there.

Reference numeral 50 denotes a vibration imparting device for the main rotary shaft 38. As shown in FIGS. 4 and 7, the block-shaped vibrating member 51 for rotatably inserting and holding the upper portion of the main rotary shaft 38 is provided.
And a pair of upper and lower nipping rollers 52, 53 provided on the side surface of the vibrating member 51 with a nipping interval, and inside the housing 25 facing the nipping rollers 52, 53, the drive shaft 30 a of the electric motor 30. A spinning shaft 5 having a downwardly-facing stepped portion 54a connected thereto and provided vertically in parallel with the main rotary shaft 38;
4 and the center hole 55a is vertically and freely rotatably fitted into the spinning shaft 54, and the peripheral edge is inserted into the above-mentioned holding space, and is connected to the vibration member 51 via the holding rollers 52 and 53. The vibration disk 55 fitted to the lower portion of the spinning shaft 54 below the vibration disk 55 is engaged with the step portion 54a, and the lower end is received by the bearing 65 on the housing side. A rotating disk 56 positioned below the vibration disk 55 at a required interval, and the rotating disk 56 and the vibration disk 55 are connected at an eccentric portion, and the vibration disk 55 is inclined on the rotation disk 56. And a joint capable of adjusting the inclination with the connecting portion as a fulcrum.

A balance weight 56a is attached to the opposite side of the connecting portion of the turntable 56 so as to offset the eccentric load due to the connecting portion at the eccentric position so as to prevent the rotation runout.

The sandwiching gap of the vibrating disk 55 can be made easier by providing the upper sandwiching roller 52 on the vibrating member 51 by bearing the shaft portion on the eccentric bearing 52a. In the eccentric bearing 52a, since a difference in height occurs due to rotation,
By loosening the set screw 52b and rotationally displacing the eccentric bearing 52a, it is possible to set a sandwiching gap according to the inclination angle of the excitation disk 55.

Exciting disk 55 of the spinning shaft 54
The two side surfaces on which are inserted are provided with chamfers 54a and 54a, and the holes 55a of the vibrating disk 55 are formed such that opposing inner edges are formed in parallel, and receiving members 55b, 55b are provided on both inner edges.
The contact between the receiving member 55b and the chamfer 54a causes the vibration disk 5 to move together with the spinning shaft 54.
5 rotate in the same manner.

The above-mentioned joint comprises a vibration disk 55 and a rotating disk 5.
Sleeves 5 fitted in the holes of the eccentric portions 6
7, 58, spherical bearings 59, 60 provided in the respective sleeves, and a connecting shaft 61 formed by bolts penetrating through the bearings and extending over the excitation disk 55 and the rotary disk 56, and screwed thereto. And a nut member 62.

The above-mentioned joint comprises a circular scale plate 63 fixed to the upper end of the sleeve 57 on the vibration disk side.
And a pointer plate 64 protruding from a side of the connecting shaft 61 facing the scale plate 63.
The angle of the vibrating desk 55 can be set based on the amount of rotation of the connecting shaft that can be read from the pointer 3 and the pointer plate 64.

In the bore finishing machine having the above-described configuration, the reamer 40 is inserted into the mounting portion 39, and the connection terminal 4a at the outer end of the rotary shaft 4 is directly or directly connected to the joint 43a at the lower end of the rotary shaft 43. (Not shown), and the shuttle part 2 is fixed to the mounting part 39 by screwing, so that the reamer 40 can be easily mounted on the main rotating shaft 38.

In such a bore finishing machine, the grinding and finishing by the reamer 40 is performed by using the rotational force of the main motor 28 by the transmission shaft 31 and the pulley 34,
36 and the timing belt 37.
2 can be easily performed. Since the rotation transmission in the rotary cylinder 32 is performed between the upper and lower bearings,
Rotational runout, which tends to occur when transmission is performed at the shaft end, does not occur, and therefore, no rotational runout also occurs in the main rotary shaft 38 that rotates together with the rotary cylinder 32 by the key member 42, so that eccentric rotation in the reamer 40 is prevented. Thus, high-precision grinding can be performed.

The main rotating shaft 38 has a set stroke range (0 mm to 3 mm) by a vibrating member that inserts and holds the upper portion thereof.
Vibrates up and down. This vertical vibration is performed by rotating the spinning shaft 54 by the electric motor 30 for reamer vibration. When the spinning shaft 54 rotates, the coaxial excitation disk 59 and the rotating disk 60 rotate together, and the disk periphery having a difference in height due to the inclination holds the periphery in the process of moving between the holding rollers. Roller 5
Either of 2 and 53 is pressed upward and downward every one rotation, whereby the vibration member 51 vibrates up and down together with the main rotating shaft 38. Since the reamer 40 mounted on the mounting portion 39 at the shaft end also vibrates up and down due to the vertical vibration of the main rotary shaft 38, the grinding finish is performed under rotation and vertical vibration.

Next, for adjusting the outer diameter of the cutting portion 3 of the reamer 40, the main motor 28 is braked and stopped, and the transmission shaft 31 transmits the pulleys 34, 36 and the timing belt 37 to the rotary cylinder 32. The rotation can be forcibly stopped, and the main rotating shaft 38 is fixed together with the rotary cylinder 32, and then the adjustment motor 29 is started.

When the intermittent gear 45 is rotated by the start of the adjusting motor 29, the pinion 44 rotates together with the rotating shaft 43 every one rotation. This rotating shaft 43
Since the rotary shaft 4 inside the reamer is fitted to the shaft end of the shuttle shaft, the rotary shaft 4 rotates inside the shuttle 2 together with the rotary shaft 43, and the screw shaft 7 is screwed onto this. 9 is moved by the screw lead, the guide hole 8 and the guide pin 10 as described above, and the diameter of the grinding portion 3 is expanded by the diameter expanding member 11.

Accordingly, the outer diameter of the grinding section 3 can be mechanically increased and reduced by a manual operation using a jig so far. The outer diameter of the grinding section 3 can be adjusted arbitrarily and with high accuracy. Such mechanical expansion and contraction adjustment of the reamer 40 further improves the grinding accuracy, and makes it possible to easily and easily perform ultra-precision finishing such as a through hole, which has been difficult with manual adjustment.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a reamer according to the present invention, which is capable of adjusting a grinding portion to expand and contract, before diameter expansion.

FIG. 2 is a vertical sectional front view when the diameter is increased.

FIG. 3 is a side view schematically showing a bore finishing machine provided with a reamer of the present invention, the housing being longitudinally sectioned.

FIG. 4 is a vertical side view of the reamer drive unit according to the first embodiment.

FIG. 5 is a partial plan view of the bore finishing machine in which a motor for adjusting the diameter of the grinding portion of the reamer is omitted.

6 is a partial vertical sectional side view taken along line VI-VI of FIG. 5;

FIG. 7 is a longitudinal sectional side view of a vibration imparting device for a main rotating shaft.

FIG. 8 is a plan view of the same.

FIG. 9 is a side view of the vibration applying device when the excitation disk is inverted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reamer main body 2 Shuttle part 3 Grinding part 4 Rotating shaft 5 Slit 6 Inner peripheral surface 7 Screw shaft 8 Guide hole 9 Slide shaft 10 Guide pin 11 Enlarged member 12 Bolt 28 Main motor 29 Motor for adjusting diameter of reamer 30 Up and down reamer Electric motor for vibration 31 Power transmission shaft 32 Rotating cylinder 33 Drive shaft 37 Timing belt 38 Main rotation shaft 39 Mounting part 40 Reamer 42 Key member 43 Rotation shaft for enlargement / reduction 44 Pinion 45 Intermittent gear 48 Proximity switch 50 Vibration applying device 51 Vibration member 52, 53 Nipping roller 54 Spinning shaft 55 Vibration desk 56 Rotating disk 56a Balance weight 61 Connecting shaft 63 Scale plate 64 Pointer plate

Continued on the front page (72) Inventor Toshiyuki Nomoto 1-2-1, Shirooka, Nagaoka-shi, Niigata Prefecture Inside Kurashiki Kikai Co., Ltd. F-term (reference) 3C050 EB07 3C058 AA03 AA09 AA12 BA09 CB01 CB03

Claims (8)

[Claims] 1. A hollow shuttle section in which a rotary shaft formed by a screw cylinder is operably operated from the outside, and a plurality of cylindrically-shaped slits which are axially long at a plurality of positions on a peripheral wall and have an inner peripheral surface at an upper portion of the slit. A reamer body consisting of a tapered surface grinding portion extending from the open end to a slide shaft in the reamer body having an axial guide hole at an intermediate portion with a screw shaft at one end and a diameter increasing member at the other end. The slide shaft and the rotary shaft are screwed together by the screw shaft and connected in the shuttle portion, and the rotation of the rotary shaft slides by a guide pin inserted from the shuttle portion side into the guide hole. The outer diameter of the grinding portion is arbitrarily adjustable by the expanding member that is converted into linear motion of the shaft and moves in the axial direction together with the slide shaft. Reamer capable scaling adjustment, characterized by comprising. 2. The reamer according to claim 1, wherein the grinding section is made of a diamond grindstone which is attached to a base material by selecting an optimum grain size and density according to a material and hardness of a workpiece. 3. The enlarged diameter member has a tapered cone having an outer peripheral surface formed on the same tapered surface as the tapered inner peripheral surface of the grinding portion, and an outer diameter of a bottom surface substantially equal to an inner diameter of an opening end of the grinding portion. 2. The expansion and contraction adjustment according to claim 1, wherein the slide shaft is integrally connected to the other end of the slide shaft by a bolt screwed to a bottom surface thereof, and is configured to be forcibly moved in an axial direction in the grinding portion together with the slide shaft. Reamer. 4. A hollow main rotary shaft for grinding, which is provided in a vertical direction rotatably mounted on a housing held rotatably on a column, and has a mounting portion for a reamer body at a lower end thereof, and a main rotary shaft thereof. A reamer enlarged / reduced diameter formed in a joint rotatably inserted and supported inside the shaft and having a pinion at an upper end protruding from the main rotation shaft and having a lower end connecting a rotation shaft in the reamer body within the main rotation shaft. An intermittent gear that temporarily meshes with the pinion to rotate the pinion together with the rotary shaft by a set rotation angle, and detects the tip position of the intermittent gear to operate the drive source. A position confirmation sensor that transmits a stop signal and always stops the intermittent gear outside the meshing position, a main motor on a housing that rotationally drives the main rotation shaft via a transmission mechanism, the intermittent gear and a pinion Through Consists of a motor for rotating the rotary shaft, the rotary motion of the rotary shaft of the rotary shaft lower end by the electric motor is converted into linear motion of the slide shaft within the reamer body screwed to the rotary shaft,
A bore finishing machine equipped with a reamer capable of adjusting expansion and contraction, characterized in that the outer diameter of a grinding portion can be adjusted by an expanding member in a reamer body at an end of a slide shaft. 5. A rotary cylinder for driving a main shaft in a vertical direction, which is rotatably mounted on the housing, and is disposed in the housing in parallel with the rotary cylinder and connected to a drive shaft of the main motor. A transmission mechanism comprising a transmission shaft, pulleys integrally provided around the transmission shaft and the outer periphery between the bearings of the rotary cylinder, and a belt wound around the pulleys is provided. The rotating shaft is inserted, and the main rotating shaft is integrally connected to the rotating cylinder in the rotating direction via a key member so as to be freely movable in the axial direction. 5. The bore finishing machine according to claim 4, wherein said bore finishing machine is configured to be rotatable and movable up and down together with said shaft. 6. A block-shaped vibrating member that rotatably inserts and holds the upper portion of the main rotating shaft, a pair of upper and lower nipping rollers provided with a nipping interval on the side of the vibrating member, and a nipping roller. A spinning shaft vertically provided in the housing facing in parallel with the main rotation shaft, and a slanting fitting fitted to the spinning shaft, and a peripheral edge inserted into the holding space, and a vibration member via the pair of holding rollers A vibrating disk connected to the rotating disk, a rotating disk fitted and fixed to the lower part of the spinning shaft below the vibrating disk at a required interval between the vibrating disk and the rotating disk, 6. A vibration imparting device for a main rotary shaft, comprising: a coupling connecting an oscillating disk at an eccentric portion, and a joint for supporting the oscillating disk on a rotating disk with the connecting portion as a fulcrum. Boa with a reamer that can be adjusted Finishing machine. 7. The coupling according to claim 1, wherein the fitting includes a sleeve fitted into each of the vibrating disc and a hole at an eccentric portion of the rotating disk.
The expansion and contraction adjustment according to any one of claims 4 to 6, comprising a spherical bearing provided in each sleeve, a connecting shaft and a nut formed by bolts penetrating through the bearings and extending between the excitation disk and the rotating disk. Bore Finishing Machine with Reamer 8. The joint includes a circular scale plate fixed to an upper end of a sleeve on a vibrating disk side, and a pointer member protruding from a side of the connecting shaft facing the scale plate. 8. The bore finishing machine according to claim 7, wherein the angle of the vibrating disk can be set based on the rotation amount of the connecting shaft read from the pointer member.